Method for driving AMOLED

Abstract

An method of driving an AMOLED is provided, including: dividing grayscale values of each pixel of each frame into N portions, so as to obtain N PWM driving signals of an organic light emitting diode; dividing the driving time of each frame of the organic light emitting diode into N sub-driving times, wherein one of the sub-driving times of each frame corresponds to one of the PWM driving signals; and transmitting all of the PWM driving signals of each frame to the organic light emitting diode at the corresponding sub-driving time, so as to drive and display an image.

What is claimed is: 
     
       1. A method of driving an active-matrix organic light emitting diode (AMOLED), comprising:
 representing grayscale values of each pixel of each frame in format of binary values; 
 dividing the grayscale values of each pixel of each frame by bytes into N portions, so as to obtain N PWM (Pulse Width Modulation) driving signals of an organic light emitting diode, where N is a positive integer greater than or equal to 1; 
 dividing a driving time of each frame of the organic light emitting diode into N sub-driving times, wherein one of the sub-driving times of each frame corresponds to one of the PWM driving signals; 
 transmitting all of the PWM driving signals of each frame to the organic light emitting diode at a corresponding sub-driving time; and 
 synthesizing all of the PWM driving signals of each frame to form the grayscale values of each pixel of each frame, so as to drive and display an image; 
 wherein the grayscale values of each pixel of each frame are divided into 8 bits, and each PWM driving signal represents one bit of the grayscale values. 
 
     
     
       2. The method of driving an AMOLED as claimed in  claim 1 , further comprising: discharging an energy storage capacitor corresponding the organic light emitting diode by a discharge signal after displaying each frame. 
     
     
       3. The method of driving an AMOLED as claimed in  claim 1 , wherein the PWM driving signal comprises a first start signal, a first clock signal, and a first enable signal. 
     
     
       4. The method of driving an AMOLED as claimed in  claim 2 , wherein the discharge signal comprises a second start signal, a second clock signal, and a second enable signal. 
     
     
       5. The method of driving an AMOLED as claimed in  claim 1 , wherein a range of the grayscale values of each pixel is between 0 and 255. 
     
     
       6. The method of driving an AMOLED as claimed in  claim 1 , wherein the PWM driving signal has two statuses including a high level driving signal and a low level driving signal. 
     
     
       7. A method of driving an active-matrix organic light emitting diode (AMOLED), comprising:
 dividing grayscale values of each pixel of each frame into N portions, so as to obtain N PWM (Pulse Width Modulation) driving signals of an organic light emitting diode, where N is a positive integer greater than or equal to 1; 
 dividing a driving time of each frame of the organic light emitting diode into N sub-driving times, wherein one of the sub-driving times of each frame corresponds to one of the PWM driving signals; 
 transmitting all of the PWM driving signals of each frame to the organic light emitting diode at a corresponding sub-driving time; and 
 synthesizing all of the PWM driving signals of each frame to form the grayscale values of each pixel of each frame, so as to drive and display an image; 
 wherein the grayscale values of each pixel of each frame are divided into 8 bits, and each PWM driving signal represents one bit of the grayscale values. 
 
     
     
       8. The method of driving an AMOLED as claimed in  claim 7 , wherein the grayscale values of each pixel of each frame are divided into N portions by bytes. 
     
     
       9. The method of driving an AMOLED as claimed in  claim 7 , wherein before the step of dividing grayscale values of each pixel of each frame into N portions, the method further comprises:
 representing grayscale values of each pixel of each frame in format of binary values. 
 
     
     
       10. The method of driving an AMOLED as claimed in  claim 7 , further comprising: discharging an energy storage capacitor corresponding to the organic light emitting diode by a discharge signal after displaying each frame. 
     
     
       11. The method of driving an AMOLED as claimed in  claim 7 , wherein the PWM driving signal comprises a first start signal, a first clock signal, and a first enable signal. 
     
     
       12. The method of driving an AMOLED as claimed in  claim 10 , wherein the discharge signal comprises a second start signal, a second clock signal, and a second enable signal. 
     
     
       13. The method of driving an AMOLED as claimed in  claim 7 , wherein a range of the grayscale values of each pixel is between 0 and 255. 
     
     
       14. The method of driving an AMOLED as claimed in  claim 7 , wherein the PWM driving signal has two statuses including a high level driving signal and a low level driving signal.